package com.li.test.leetcode;

import java.util.Stack;

public class Solution {
    public boolean isValid(String s){
        Stack<Character> stack = new Stack<>();
        for (int i=0;i<s.length();i++) {
            char c =s.charAt(i);
            if(c=='{'||c=='['||c=='('){
                stack.push(c);
            }else {
                stack.pop();
            }

        }
        return false;
    }
}
